<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        div,a{
            width: 100px;
            height: 100px;
            border: 1px solid #333;
            margin-top: 100px;
            margin-bottom: 100px;
        }
        img{
            width: 100px;
            height: 100px;
        }
    </style>
</head>
<body>
    <!--块标签
        特点：独占一行
    -->
    <div>div</div>
    <h1>h1</h1>
    <h6>h6</h6>
    <p>hello word</p>
    <ul>
        <li>hello word</li>
        <li>hello word</li>
        <li>hello word</li>
    </ul>
    <dl>
        <dt>HTML</dt>
        <dd>dd</dd>
    </dl>
    <!--内联标签
        1.并排显示
        2.不能设置width和height
        3.不能设置margin-top,margin-bottom
        display:inline
    -->
    <a href="#">a</a>
    <span>span</span>
    <em>em</em>
    <strong>strong</strong>
    <p>hello word!</p>
    <br>
    <!--内联块
        特点：
        1.并排显示
        2.能够设置width，height
        display:inline-block
    -->
    <img src="images/pc3.jpg" alt="">
    <button>btn</button>
    <input type="text">
</body>
</html>